42561130609 has 4 divisors (see below), whose sum is σ = 42562424740. Its totient is φ = 42559836480.

The previous prime is 42561130603. The next prime is 42561130621. The reversal of 42561130609 is 90603116524.

42561130609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27638065009 + 14923065600 = 166247^2 + 122160^2 .

It is a cyclic number.

It is not a de Polignac number, because 42561130609 - 2¹⁵ = 42561097841 is a prime.

It is a super-2 number, since 2×42561130609² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42561130603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596412 + ... + 663949.

It is an arithmetic number, because the mean of its divisors is an integer number (10640606185).

Almost surely, 2^42561130609 is an apocalyptic number.

It is an amenable number.

42561130609 is a deficient number, since it is larger than the sum of its proper divisors (1294131).

42561130609 is a wasteful number, since it uses less digits than its factorization.

42561130609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294130.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 42561130609 in words is "forty-two billion, five hundred sixty-one million, one hundred thirty thousand, six hundred nine".